Rotation of the small intestines around the small mesenterial root, mostly in malrotation (also in this case).

Radiological findings:

Ultrasound 1: There is a bulls-eye structure in the epigastrium (B-image)

Ultrasound 2: After turning on the colored doppler, there is a spiral-shaped vessel within the bulls-eye structure, which is rotated around the superior mesenteric artery. It is the mesenteric vein ("whirlpool sign").

(The superior mesenteric artery is therefore not able to be found on the right side of the superior mesenteric artery, but rather through the rotation of the mesenterial root, it lies on the left side)